Remark 8.5 Limit relations (REF ) and (REF ) generalize Fuglede's results [1]} (Lemma 2.3.3 and Theorem 4.2), given in the case where \(A\)  is the union of an increasing sequence of universally measurable subsets (and hence \(A\)  is likewise universally measurable).See also [2]} pertaining to the Riesz kernels on \(\mathbb {R}^n\) . This generalization (see Sect. REF  for a proof) is substantially based on Theorem REF , which makes it possible to reduce the analysis to that for Borel sets.

